Tire size for stock cop wheels

[Turboomni]

So I ended up getting the 15x7 squad/interceptor wheel. Still debating on what tires I'm going to go with but definitely want white walls/lettering. What would be the widest tire I could get on a 15x7 rim safely, I do plan on driving it spirtited. Also would anyone happen to knkw the cone degree for the wheels and type of Lug nuts for the 65 fury? The driver side still has the LH studs.

When I was offered a deal I couldn't refuse on 2 tires [ BFG 255/60/15's] I did some quick on the phone research. I found that the minimum rim width was 7 inches wide. So since I was within the recommended requirements and the price was insanely cheap,[good friend ] I went with it. These were installed on the front. Ideally I would have gone with an 8 inch wide rim for the 255's, but turn in and corners are better than with the 235/70/15's. But I do not drive my 69 Fury III in any spirited way but straight!

Here she is with the fronts on.